JPH10279146A - Take-up mechanism, and printer using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a take-up mechanism, and a printer using that in which recording paper can be stably taken up in a simple constitution without requiring high parts precision and assembling precision. SOLUTION: A printer 1 is provided with a take-up mechanism 5 to take up a recording paper 7 such as a journal paper at a tack part of a printer main body 3. A take-up shaft 23 of the take-up mechanism 5 is overhang- supported by a support plate 24, and it has a take-up flange 25 on the side of the support plate 24. The take-up shaft 23 is inclined in such a way that paper feed passage length at an end part on the side where the take-up flange 25 is not provided is longer than paper feed passage length at an end part on the side where the take-up flange 25 is provided. A printed recording paper 7 is taken up by the take-up shaft 23 through a flat surface part 22a of a writing base 22 for correcting printing. Protruded parts 220a, 220b are provided at both end parts in a paper feed direction of the flat surface part 22a of the writing base 22, thereby paper feed passage length at a center part of the recording paper 7 in the paper feed direction is set to be longer than paper feed passage length at both end parts of a paper width direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding mechanism for winding recording paper such as journal paper and a printer using the same.

[0002]

2. Description of the Related Art For the purpose of managing sales and inventory at stores and the like, it has been widely used to store journal paper on which sales prices, product names, and the like are printed.
As means for that purpose, there has been proposed a printer configured to wind a printed journal paper around a winding shaft.

As this type of printer, for example, FIG.
The following are known.

[0004] As shown in FIG.
Is a dot impact printer incorporated in a cash register or the like. As shown in FIG.
2 is detachable printer body 103 and printer body 1
It comprises a clamshell movable part 104 rotatably supported at a position near the rear of the upper part of the printer 03 and a winding mechanism 105 provided behind the printer main body 103.

In this printer, recording paper 106 such as journal paper printed by a print head (not shown)
Is sent out above the clamshell movable part 104 by the paper feeding means 107 shown in FIG. 10 or FIG. 11, and is wound around the winding shaft 109 of the winding mechanism 105 through the flat part 108 a of the writing base 108 for print correction. It is configured to be taken.

[0006] The winding shaft 109 is connected to the printer main body 103.
The cantilever is supported rotatably on a support plate 110 fixed to the rear of the vehicle, and a disk-shaped winding flange 111 is fixed to a portion on the support plate 110 side. A driving gear 11 is provided at the end of the winding shaft 109 on the support plate 110 side.
2 is fixed. The take-up shaft 109 is driven to rotate by meshing with a gear group 114 driven by a take-up belt 113 interlocked with a paper feed mechanism in the printer main body 103 and a gear 112 fixed to the take-up shaft 109. It has become so.

FIGS. 10 and 11 show this printer 101.
1 shows the principle of winding the recording paper 106 by the winding mechanism 105 used in the first embodiment.

In the conventional example shown in FIG. 10, the distance between the paper feeding means 107 and the winding portion of the winding shaft 109 is
The recording paper 106 is configured so as to have the same width over the entire width of the recording paper 106, and the winding reaction force r ₁ generated by the winding force f ₁ uniformly acts on each portion in the paper width direction, so that the recording paper 106
It is configured so that no meandering or the like occurs.

On the other hand, in the case of the conventional example shown in FIG. 11, the winding shaft 109 is inclined such that the paper feed path length at the end where the winding flange 111 is not provided is the longest, and the winding force of the winding shaft 109 is increased. produced by winding f _2, the winding flange 111
By the action of a component force r ₃ winding a reaction force r ₂ toward, and is configured to press the recording sheet 106 to the take-up flange 111 (e.g., Japanese Utility Model 64-131
According to this configuration, the edge of the recording paper 106 can be wound up with the winding flange 111 aligned.

[0010]

However, such a conventional winding mechanism has the following problems. That is, in the case of the conventional example shown in FIG.
In order to prevent the meandering of 06 it has to the winding force N ₁ in the paper feeding portion equal in each portion in the paper width direction of the recording paper 106, advanced component precision and assembly precision for the It is necessary and causes an increase in cost.

On the other hand, in the case of the conventional example shown in FIG. 11, since the winding force f ₂ is concentrated at one end of the recording paper 106 in the paper width direction, the recording paper f The winding force N ₂ acts on one end of the sheet 106 to pull that part, and further the other part 1
As a result, the recording paper 106 may meander. When the recording paper 106 meanders, there is a problem that the recording paper 106 comes into contact with the guide member 116 and breaks or the like occurs at the end.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems of the prior art. It is an object of the present invention to provide a high-precision component and assembling system without requiring high precision.
An object of the present invention is to provide a winding mechanism capable of stably winding recording paper with a simple configuration and a printer using the same.

[0013]

In order to achieve the above object, the invention according to claim 1 comprises a paper feeding means for sequentially feeding a long recording paper in the longitudinal direction thereof, and a recording paper fed by the paper feeding means. Take-up means having a take-up shaft for taking up the recording paper; and feeding the recording paper so that the paper feed path length at the center of the recording paper in the paper width direction is longer than the paper feed path length at both ends in the paper width direction. And a paper feed regulating member for regulating.

In the first aspect of the present invention, since the length of the paper feed path at the center of the recording paper in the paper width direction is longer than the length of the paper feed path at both ends in the paper width direction, the center of the recording paper in the paper width direction is stretched. As a result, the winding force on the recording paper concentrates on the central portion in the paper width direction and does not act on the end portion in the paper width direction, so that the recording paper can be prevented from meandering.

In the first aspect of the present invention, it is not necessary to consider that a uniform force is applied to each portion of the recording paper in the paper width direction, so that a high precision of parts and assembly is not required. is there.

In the present application, as in the second aspect of the present invention, in the first aspect of the present invention, the paper feed regulating member intersects the recording paper surface at a portion corresponding to a central portion of the recording paper in the paper width direction. It may be configured to have at least one or more projections projecting in the direction.

According to the second aspect of the present invention, the length of the paper feed path at the central portion in the paper width direction of the recording paper is extended by the protrusion projecting in the direction intersecting the recording paper surface, and the central portion in the paper width direction is stretched. Since the paper is fed in a state where the paper is regulated, the winding force on the recording paper can be easily concentrated on the central portion in the paper width direction.

In this case, if a plurality of protrusions are provided on the paper feed regulating member, it is possible to more reliably prevent the recording paper from meandering.

Further, as in the invention according to claim 3, in the invention according to any one of claims 1 and 2, the winding means includes a winding shaft whose cantilever is supported by the main body frame. A take-up flange may be provided at at least one end of the take-up shaft, and further, there may be provided a pressing means for pressing the recording paper against the take-up flange when the recording paper is taken up.

According to the third aspect of the present invention, when the recording paper is wound, the recording paper is pressed against the winding flange by the pressing means, so that the recording paper is wound along the winding flange with its ends aligned. Become like

In this case, as in the invention according to claim 4,
According to the third aspect of the present invention, as the pressing means, the paper feed path length at the end of the winding shaft on the side where the winding flange is not provided is the paper feeding path length at the end where the winding flange is provided. The winding shaft can be inclined so as to be longer than the path length.

According to the fourth aspect of the present invention, the recording paper is stretched on a line connecting the end of the winding shaft on the side where the winding flange is not provided and the paper feed regulating member. Since a take-up reaction force corresponding to the take-up force is generated at the portion, a component force of the take-up reaction force in the direction toward the take-up flange acts on the recording paper on the take-up shaft, and as a result, the recording paper is taken up. The recording paper is pressed against the flange, whereby the recording paper is wound along the winding flange with its ends aligned.

Further, as in the invention according to claim 5, in the invention according to any one of claims 1 to 4,
A paper feed regulating member may be provided between the paper feed means and the winding means.

According to the fifth aspect of the present invention, the length of the paper feed path at the central portion in the paper width direction of the recording paper fed by the paper feeding means can be easily extended, and the recording paper can be more reliably made. Meandering can be prevented.

According to a sixth aspect of the present invention, there is provided a printing means for performing printing on a recording sheet mounted on a main body of the apparatus, and a winding mechanism according to any one of the first to fifth aspects. A printer characterized in that the recording paper printed by the printing means is wound by the winding mechanism.

According to the sixth aspect of the present invention, it is possible to reliably wind a printed recording paper such as a journal paper without meandering, and it does not require a high precision of parts and assembly. You can get a printer.

In this case, as in the invention of claim 7,
In the invention according to claim 6, the paper feed regulating member of the winding mechanism may be configured to also serve as a print correction writing table provided downstream of the printing means in the paper feed direction.

According to the seventh aspect of the present invention, the number of parts can be reduced in a printer capable of correcting recording paper after printing.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a winding mechanism according to the present invention and a printer using the same will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the overall configuration of an embodiment of the printer according to the present invention, FIG. 2 is a plan view of the printer of FIG. 1, and FIG. 4 is a cross-sectional view taken along line CC of FIG. 2, and FIG. 5 is a rear perspective view of the printer of FIG.

As shown in FIG. 1, a printer 1 according to the present embodiment is a dot impact printer incorporated in a cash register or the like, and includes a printer main body 3 to which a ribbon cassette 2 can be attached and detached, and a rear upper portion of the printer main body 3. And a winding mechanism 5 provided at the back of the printer body 3.

The printer body 3 includes a printing mechanism (not shown) for reciprocating a carriage on which the print head 6 is mounted in the width direction of the recording papers 7 and 8 and a mechanism for feeding the recording papers 7 and 8 to a printing position by the print head 6. Paper feed mechanism and a drive motor 9 which is a drive source common to these printing mechanism and paper feed mechanism.
And is equipped with.

On the other hand, the clamshell movable section 4 is provided above the paper feed means 13, a paper feed means 13 comprising a platen 10, a paper feed roller 11 and a paper press roller 12 for pressing a recording paper against the paper feed roller 11. An automatic cutter mechanism 14 (see FIG. 2) for cutting the receipt paper 8 includes an upper paper guide 15 formed of resin.
Other components are mounted on the base.

Here, a projection (not shown) is formed on the upper paper guide 15 to engage with the hole 3a arranged on the frame 3A of the printer body 3. The projection is engaged with the hole. It constitutes the rotation center shaft 16 of the clamshell movable part.

The upper paper guide 15 is also provided with a not-shown engaging portion which engages with a not-shown claw portion rotatably mounted on the printer main body 3. With the above configuration, the upper paper guide 15 is normally fixed at a fixed position by the claw portion, and by releasing the engagement between the claw portion and the locking portion, the rotation center shaft which is a support portion of the printer main body 3 is formed. It is rotated about 16.

As shown in FIGS. 4 and 5, the clamshell movable section 4 includes an upper paper guide 15 and a lower paper guide 19 extending from paper feed ports 17 and 18 at the rear of the printer body 3 to a printing position.
The printer is rotatably mounted at the upper rear position of the printer body 3 so as to expose the paper path 20 formed by the printer. In FIG. 4, a solid line indicates a closed state of the clamshell movable section 4, and a virtual line (two-dot chain line) indicates an open state of the clamshell movable section 4.

As shown in FIG. 2, the paper feed ports 17, 18
The clamshell movable part 4 is arranged side by side at the rear part.

The paper feed port 17 is supplied with recording paper 7 such as journal paper stored at the store side for managing sales and inventory. As shown in FIG. 4, the recording paper 7 is arranged at the lower rear part of the printer main body 3, and the leading end thereof reaches the printing position from the paper feed port 17 through the paper path 20. Then, the recording paper 7 on which the printing has been performed is sequentially output to the discharge port 2.
From 1 through a writing table 22 provided above the clamshell movable section 4, it is wound on a winding shaft 23 of a winding mechanism 5 attached to a rear portion of the printer main body 3.

The take-up shaft 23 is rotatably cantilevered by a support plate 24 fixed to the rear of the printer body 3, and a disk-shaped take-up flange 25 is fixed to the support plate 24 side. Have been. A driving gear 26 is fixed to the end of the winding shaft 23 on the support plate 24 side. The take-up shaft 23 meshes with a gear group 28 that is driven to rotate by a take-up belt 27 that is interlocked with the paper feeding means 13 in the printer main body 3 and a gear 26 that is fixed to the end of the take-up shaft 23. Is driven to rotate.

The take-up shaft 23 has a paper feed path length at the end where the take-up flange 25 is not provided.
It is inclined so as to be longer than the paper feed path length at the end on the side where the winding flange 25 is provided. In this case, it is sufficient that the inclination angle of the winding shaft 23 is smaller than that of the conventional example shown in FIG.

On the other hand, the recording paper 8 such as receipt paper to be delivered to the customer is supplied to the paper supply port 18. This recording paper 8
Reaches the printing position through the same paper path 20 as the recording paper 7, and after being printed, is sent upward from a receipt discharge port 29 provided on the upper surface of the clamshell movable section 4.

As shown in FIG. 4, a stamp set 30 for imprinting a store name or the like is detachably mounted below the paper feed port 18 where the recording paper 8 is fed.

The paper feed ports 17 and 18 are provided with a feed roller 31 for feeding the recording paper 7 and the recording paper 8. As shown in FIG. 4, the feeding roller 31 is provided at a position which is higher than the rotation center axis 16 of the clamshell movable part 4 by a predetermined amount, that is, at a position near the upper end of the rear part of the clamshell movable part 4. ing.

The feed roller 31 is constantly rotating during the operation of the printer, and when the paper is fed by the driving force generated by the paper feed roller 11 when the recording paper 7 and the recording paper 8 are fed, A frictional force is generated between the feeding roller 31 and the paper, and the paper is fed in the transport direction. As a result, the paper feeding load caused by the inertial mass of the roll paper can be reduced.

The feeding roller 31 has a roller shaft driving gear 32 disposed on the clamshell movable portion 4 side, and is rotatably attached to a part 15 a of the upper paper guide 15 forming the paper feed ports 17 and 18. Have been. A transmission gear 33 for meshing with the roller shaft drive gear 32 to rotate the feed roller 31 is provided on the printer body 3 side.
It is supported coaxially with the rotation center axis 16 of the clamshell movable section 4. With this configuration, the roller shaft drive gear 32 on the clamshell movable section 4 side and the transmission gear 3 on the printer body 3 side
3 means that the meshing state does not come off even when the clamshell movable part 4 is opened.

On the other hand, as shown in FIG. 2 or FIG. 5, an automatic cutter mechanism 14 for cutting the continuous recording paper 8 and a cutter driving source 34 for driving the automatic cutter mechanism 14 are provided in the clamshell movable section 4. Is equipped. The cutter driving source 34 for driving the auto cutter mechanism 14 is a high torque type motor, and the cutter frame 3 of the clamshell movable section 4
5, a writing table 22 for correcting journal print
The motor cover 3 is arranged under the
6 is covered.

When the printer is placed horizontally, it is preferable to convey the recording paper 7 perpendicularly to the line of sight in order for an operator such as a clerk to easily visually recognize the printing result of a receipt or the like. In the embodiment, the flat portion 22 of the writing table 22 is formed by pressing a metal plate.
a is formed so as to be inclined toward the front side, and a space is formed below it. In the case of the present embodiment, a DC motor serving as the cutter driving source 34 is arranged by utilizing a space below the DC motor. The writing table 22 may be formed by processing a part of the cutter frame 35 obliquely.

On the other hand, in the present embodiment, a projection 220 for preventing the recording paper from meandering is provided at the center of the plane portion 22a of the writing table 22 in the paper width direction. In the case of the present embodiment, the projecting portions 22 are formed on both ends of the plane portion 22a of the writing table 22 in the paper feeding direction, for example, by sheet metal processing.
0a and 220b are integrally formed.

FIG. 6 shows the principle of the present invention.

Here, in order to facilitate understanding,
An example in which one projection 220 is provided on the flat portion 22a of the writing table 22 will be described.

As shown in FIG. 6, in the present invention, particularly in the above-described embodiment, the flat portion 22a of the writing table 22 is located between the paper feeding means 13 and the winding means 5. . In this case, as described above, the writing table 2
2 is inclined toward the near side, and the take-up shaft 23 is located below the writing table 22, so that when the recording paper is wound, the recording paper is It is bent downward on the downstream side in the feed direction and closely contacts the flat portion 22 a of the writing table 22.

On the other hand, in the case of this embodiment, the winding shaft 23
Is inclined such that the paper feed path length at the end where the winding flange 25 is not provided is longer than the paper feed path length at the end where the winding flange 25 is provided. Thus, the recording paper is stretched on a straight line M connecting the projection 220 of the writing table 22 and the end of the winding shaft 23 on the side where the winding flange 25 is not provided. A take-up reaction force R ₁ with respect to the take-up force F is generated.

As a result, the take-up reaction force R on the take-up shaft 23 against the recording paper in the direction toward the take-up flange 25
Since _{the first} component force R ₂ acts, the recording paper winding flange 2
5, thereby being wound along the winding flange 25.

On the other hand, in the case of this embodiment, the writing table 2
2, the paper feed path length at the center in the paper width direction is longer than the paper feed path length at both ends in the paper width direction.
In (a), since the winding force T for the recording paper concentrates on the central portion in the paper width direction and acts in the paper feeding direction, the recording paper does not meander, and the recording paper can be fed in a stable manner. . As a result, according to the present embodiment, the end surface of the recording paper does not break due to the meandering of the recording paper.

In particular, as in the embodiment shown in FIG. 1, a plurality of projections 220a,
By providing 220b, it is possible to more reliably prevent the recording paper from meandering.

On the other hand, in the case of the present embodiment, it is not necessary to consider that a uniform force is applied to each portion of the recording paper in the paper width direction, so that a high precision of parts and assembly is not required. Therefore, according to the present embodiment, it is possible to reduce the unit cost and the assembly cost.

It should be noted that the present invention is not limited to the above-described embodiment, and various changes can be made.

For example, the projection 220 of the writing table 22
Is not limited to those described above, and can be formed in various shapes.

FIGS. 7 and 8 show a modification of the projection 220 of the writing table 22. As shown in FIG.
By forming the end surface of the flat portion 22a of the writing table 22 on the side of the winding shaft 23 into a square mountain shape over the entire width of the paper, a projection 220A can be provided at the center thereof,
As shown in FIG. 8, by forming the portion in an arc shape, a protrusion 220 </ b> B can be provided at the center thereof.

The projection 220 of the writing table 22
It can be formed by various methods.

Further, the position where the above-mentioned protrusion 220 is provided is not necessarily limited to the flat portion 22a of the writing table 22, and a paper feed regulating member having a similar protrusion may be separately provided. However, if the projections 220 are provided on the flat portion 22a of the writing table 22 as in the above-described embodiment, the number of components can be reduced.

When the paper feed regulating member is provided separately from the writing table, in order to reliably prevent the recording paper from meandering,
It is preferable to arrange between the paper feeding means 13 and the winding means 5 and in the vicinity of the paper feeding means 13.

On the other hand, in the above-described embodiment, the type in which the winding shaft 23 of the winding mechanism 5 is cantilevered has been described as an example, but the present invention is not limited to this.
The present invention is also applicable to a structure in which a winding shaft is supported at both ends. However, this is most effective when the winding shaft of the winding means is cantilevered as in the above-described embodiment.

Further, the present invention can be applied not only to a dot impact printer but also to various printers such as a thermal printer and an ink jet printer.

[0065]

As described above, according to the winding mechanism of the present invention, stable winding of the recording paper can be performed without meandering, so that the end face can be reliably bent at the time of winding. Can be prevented.

Further, according to the winding mechanism of the present invention, since there is no need for a high degree of component accuracy and assembly accuracy, it is possible to reduce the unit cost of components and the cost of assembly.

Therefore, according to the present invention, it is possible to provide an inexpensive printer that has a high winding quality and can stably wind the recording paper.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an overall configuration of a printer according to an embodiment of the present invention.

FIG. 2 is a plan view of the printer of FIG.

FIG. 3 is a view (side view) in the direction of arrow B in FIG. 2;

FIG. 4 is a sectional view taken along line CC of FIG. 2;

FIG. 5 is a rear perspective view of the printer of FIG. 1;

FIG. 6 is an explanatory diagram showing the principle of the present invention.

FIG. 7 is an explanatory view showing another example of the protrusion.

FIG. 8 is an explanatory view showing still another example of the protrusion.

FIG. 9 is a perspective view showing the overall configuration of a conventional printer.

FIG. 10 is an explanatory diagram showing a principle of winding a recording sheet by a winding mechanism according to a conventional example.

FIG. 11 is an explanatory diagram showing a principle of winding a recording sheet by a winding mechanism according to another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Printer 2 Ink ribbon 3 Printer main body 5 Take-up mechanism 6 Print head 7, 8 Recording paper 10 Platen 11 Paper feed roller 12 Paper press roller 13 Paper feed means 22 Writing table 22 Flat part 220 (220a, 220b) Projection part 23 winding Take-up shaft 25 Take-up flange F Take-up force S Straight line R ₁ Take-up reaction force R ₂ Component force of take-up reaction force T Take-up force

Claims (7)

[Claims] 1. A paper feeding means for sequentially feeding a long recording paper in its longitudinal direction; a winding means having a winding shaft for winding the recording paper fed by said paper feeding means; A winding mechanism, comprising: a paper feed regulating member that regulates the paper feed of the recording paper so that the paper feed path length at the center in the paper width direction is longer than the paper feed path lengths at both ends in the paper width direction. 2. The paper feed regulating member has at least one projection at a portion corresponding to a center portion of the recording paper in the paper width direction, the projection protruding in a direction intersecting the recording paper surface. Item 2. The winding mechanism according to Item 1. 3. The winding means, wherein the winding shaft is cantilevered by the main body frame, and a winding flange is provided at at least one end of the winding shaft. 3. The winding mechanism according to claim 1, further comprising a pressing unit for pressing the recording paper against the winding flange. 4. The paper feeding path length at the end of the winding shaft on which the winding flange is not provided is greater than the paper feeding path length at the end of the winding shaft on which the winding flange is provided. The winding mechanism according to claim 3, wherein the winding shaft is inclined so as to be longer. 5. The winding mechanism according to claim 1, wherein a paper feed regulating member is provided between the paper feeding means and the winding means. 6. A printing means for printing on a recording paper mounted on an apparatus main body, and a winding mechanism according to claim 1, wherein the recording paper printed by said printing means is provided. Characterized in that the printer is wound by the winding mechanism. 7. The printer according to claim 6, wherein the paper feed regulating member of the winding mechanism also serves as a print correction writing table provided downstream of the printing means in the paper feed direction.